阿里云提供的yum镜像地址为：http://mirrors.aliyun.com/
| Mirror | Last update | Help |
|---|---|---|
| CPAN | 2016-03-31 15:49:25 | |
| CRAN | 2016-05-07 04:39:28 | |
| CTAN | 2016-05-07 04:11:50 | |
| apache | 2016-05-07 01:23:34 | |
| archlinux | 2016-05-07 16:56:19 | help |
| centos | 2016-05-07 02:50:21 | help |
| ceph | 2016-05-07 03:15:51 | help |
| cygwin | 2016-05-07 09:01:43 | help |
| debian | 2016-05-07 16:06:24 | help |
| debian-backports | 2016-05-07 16:50:04 | help |
| debian-cd | 2016-05-04 01:05:05 | |
| debian-security | 2016-05-07 16:30:13 | help |
| deepin | 2016-05-07 03:00:08 | help |
| docker-engine | 2016-05-07 02:05:05 | help |
| docker-toolbox | 2016-05-07 03:00:04 | help |
| dotdeb | 2016-05-07 00:05:36 | help |
| epel | 2016-05-07 14:26:46 | help |
| fedora | 2016-05-07 02:57:58 | help |
| freebsd | 2016-05-06 23:29:36 | help |
| gentoo | 2016-05-07 00:43:20 | help |
| gentoo-portage | 2016-05-07 04:00:55 | help |
| gentoo-portage-prefix | 2015-01-28 06:09:50 | |
| kali | 2016-05-07 02:19:28 | |
| kali-security | 2015-06-26 02:22:01 | |
| linux-kernel | 2016-05-07 04:00:41 | |
| macports | 2016-05-06 03:03:19 | |
| mariadb | 2016-05-07 15:30:30 | |
| mongodb | 2016-05-07 02:36:46 | |
| oldubuntu-releases | 2016-05-07 02:30:07 | |
| opensuse | 2016-05-07 13:29:16 | help |
| packman | 2016-05-07 02:20:09 | help |
| pypi | 2016-05-07 02:57:07 | help |
| raspbian | 2016-05-07 03:16:21 | help |
| rpmfusion | 2016-05-07 04:01:39 | |
| rubygems | 2016-05-07 03:21:58 | help |
| sabayonlinux | 2016-05-07 01:30:07 | |
| scientificlinux | 2016-05-07 12:21:28 | help |
| ubuntu | 2016-05-07 19:01:04 | help |
| ubuntu-releases | 2016-05-07 02:24:30 | |
| zabbix | 2016-05-07 02:40:20 |
找到自己的使用系统，点击help，可以查看更换说明，以centos为例：http://mirrors.aliyun.com/help/centos
1、备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
2、下载新的CentOS-Base.repo 到/etc/yum.repos.d/
CentOS 5
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-5.repo
CentOS 6
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
CentOS 7
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo